JPH03134903A - Head lamp for automobile - Google Patents

Head lamp for automobile

Info

Publication number
JPH03134903A
JPH03134903A JP2265290A JP26529090A JPH03134903A JP H03134903 A JPH03134903 A JP H03134903A JP 2265290 A JP2265290 A JP 2265290A JP 26529090 A JP26529090 A JP 26529090A JP H03134903 A JPH03134903 A JP H03134903A
Authority
JP
Japan
Prior art keywords
reflector
light source
parabola
light
optical axis
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2265290A
Other languages
Japanese (ja)
Inventor
Rainer Dipl Chem Dr Neumann
ライナー・ノイマン
Gerhard Lindae
ゲルハルト・リンデ
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of JPH03134903A publication Critical patent/JPH03134903A/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/33—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature
    • F21S41/331—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of complete annular areas
    • F21S41/332—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of complete annular areas with continuity at the junction between adjacent areas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/162—Incandescent light sources, e.g. filament or halogen lamps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/162—Incandescent light sources, e.g. filament or halogen lamps
    • F21S41/168—Incandescent light sources, e.g. filament or halogen lamps having a filament arranged transversally to the optical axis of the illuminating device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/17—Discharge light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/28—Cover glass
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/321—Optical layout thereof the reflector being a surface of revolution or a planar surface, e.g. truncated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/323—Optical layout thereof the reflector having two perpendicular cross sections having regular geometrical curves of a distinct nature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/33—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature
    • F21S41/334—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of patch like sectors
    • F21S41/335—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of patch like sectors with continuity at the junction between adjacent areas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/65—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources
    • F21S41/657—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources by moving light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
    • F21W2102/10—Arrangement or contour of the emitted light
    • F21W2102/13—Arrangement or contour of the emitted light for high-beam region or low-beam region

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
  • Fastening Of Light Sources Or Lamp Holders (AREA)

Abstract

PURPOSE: To improve safety of a driver by forming a headlight in which a positional relationship of a light source to a focal point of a reflector can be varied for changing a light distribution. CONSTITUTION: A reflector 1 is divided into sections 4, 5 on a horizontal center plane and provided with the same parabola 7. On a vertical center plane 8, a parabola 9 of the section 5 is provided with a shorter focal length than the parabola 7 on the plane 3, while a parabola 11 of the section 4 is provided with a long focal length. A light source 2 can be moved vertically along an optical axis 12 with respect to the reflector 1. A focal point F can be shifted from the position 13a on the optical axis 12 to a position 13b vertically above it, and this shift is adjusted by means of an adjusting device 14. As the reflector 1 is divide into two sections 4, 5, a lens 15 spreads a light distribution in the horizontal direction into a fan-shape. When the light source 2 is moved to the position 13b, a light distribution with a large light band width and maximum light intensity is generated, so that it is convenient in case of smog or rainy weather.

Description

【発明の詳細な説明】 ［産業上の利用分野コ 本発明は、リフレクタとそのリフレクタにはめ込まれた
光源とを有し、その際、光源とリフレクタの間の相対的
位置関係が、変更可能である自動車用前照灯に関する。[Detailed Description of the Invention] [Industrial Field of Application] The present invention includes a reflector and a light source fitted into the reflector, in which the relative positional relationship between the light source and the reflector is changeable. Regarding a certain automobile headlight.

［従来の技術］ このような前照灯は、すでに西ドイツ国特許出願公告第
２００６２３１号明細書によって公知である。この前照
灯は、リフレクタとそのリフレクタに対して水平方向で
移動可能な光源を有する。光源の前には、光源のロービ
ーム位置では該光源から下方のリフレクタ領域に発せら
れた光を遮蔽するブラインドが設置されている。光源の
ハイビーム位置では、光源は光が下方のリフレクタ領域
にも達するようにブラインドから離れる方向に旋回せし
められる。この前照灯においては、光源の調節はロービ
ームとハイビムの切り変えにだけ用いられる。しかしな
がら、ロービームの際この前照灯によって生じた光配分
を、その都度量も好ましい車道の照明のため、強いては
運転者の安全のために種々の天候状態に合わせることは
不可能である。BACKGROUND OF THE INVENTION Such a headlamp is already known from German Patent Application No. 2006231. This headlamp has a reflector and a light source that is movable horizontally relative to the reflector. A blind is installed in front of the light source to block the light emitted from the light source to the reflector area below in the low beam position of the light source. In the high beam position of the light source, the light source is pivoted away from the blind so that the light also reaches the reflector area below. In this headlamp, the light source adjustment is only used to switch between low beam and high beam. However, it is not possible to adapt the light distribution produced by these headlamps in the case of low beam to different weather conditions in order to ensure the safety of the driver in each case due to the favorable amount of roadway illumination.

［発明の構成コ それに対して、請求項１の特許部に記載の特徴を有する
、本発明による前照灯は、リフレクタの焦点に対する光
源の位置関係を変化させることによって光配分の変化が
生じ、その際、光源がリフレクタのほぼ焦点にある一方
の位置関係では、霧又は降雪の際に好都合であるような
、高い最大光強度を有する幅の狭い光帯が生じ、光源の
他方の位置関係では、スモッグ又は雨の際に好都合であ
るような、低い最大光強度を有する大きな幅の光帯が生
じる、という利点を有する。光源の位置関係を垂直方向
で変化させることに基づき、光配分の明暗境界は変らぬ
ままである。[Structure of the Invention] On the other hand, the headlamp according to the present invention having the features described in the patent part of claim 1 changes the light distribution by changing the positional relationship of the light source with respect to the focal point of the reflector, In one position, where the light source is approximately at the focus of the reflector, a narrow light band with a high maximum light intensity results, which is advantageous in fog or snowfall, and in the other position of the light source, , which has the advantage of producing a wide light band with a low maximum light intensity, which is advantageous during smog or rain. Based on the vertical change in the positional relationship of the light sources, the light and dark boundaries of the light distribution remain unchanged.

請求項２以降には、本発明の有利な実施態様が記載され
ている。請求項２に示されたリフレクタの実施態様によ
れば、光帯幅の拡張が達成される。請求項３に示された
リフレクタは、簡単に製造することができる。請求項４
によって光帯幅をさらに拡張することが達成される。Advantageous embodiments of the invention are described in the subclaims. According to the embodiment of the reflector specified in claim 2, an expansion of the optical band width is achieved. The reflector according to claim 3 can be manufactured easily. Claim 4
A further expansion of the optical band width is achieved.

［実施例］ 次に図示の実施例につき本発明の詳細な説明する。第１
図に示された前照灯は、リフレクタ１とリフレクタ１の
中へ、その後側からはめ込まれた光源２を有するリフレ
クタ１の光放出口は前面レンズ１５で覆われている。リ
フレクタ１は水平中心平面３で２つの部分４および５に
分割されている。両者のリフレクタ部分４および５は、
それぞれ−膜数物面によって形成されている。水平中心
平面にあるリフレクタ部分４および５の放物線７は同一
である。垂直な中心平面８にある上方リフレクタ部分５
の放物線９は、水平中心平面３にある放物線７よりも短
い焦点を有し、かつ垂直中心平面８にある下方リフレク
タ部分４の放物線１１は放物線７より長い焦点距離を有
する。[Example] Next, the present invention will be described in detail with reference to the illustrated example. 1st
The headlamp shown in the figure has a reflector 1 and a light source 2 inserted into the reflector 1 from the rear side.The light outlet of the reflector 1 is covered by a front lens 15. The reflector 1 is divided in a horizontal central plane 3 into two parts 4 and 5. Both reflector parts 4 and 5 are
Each is formed by a membrane surface. The parabolas 7 of the reflector parts 4 and 5 in the horizontal central plane are identical. Upper reflector section 5 in vertical central plane 8
The parabola 9 of has a shorter focus than the parabola 7 in the horizontal central plane 3, and the parabola 11 of the lower reflector part 4 in the vertical central plane 8 has a longer focal length than the parabola 7.

光源２はリフレクタ１の光軸１２に対して垂直に水平に
配置されたフィラメント１３を有する白熱灯として構成
されているが、同様に光軸１２に対して同様に水平に配
置されたアーク放電を有するガス放電灯として構成され
ていてもよい。光源２はリフレクタ１に関して、光軸１
２に沿ってかつまた光軸１２に垂直方向に可動である。The light source 2 is configured as an incandescent lamp with a filament 13 arranged horizontally perpendicular to the optical axis 12 of the reflector 1, but also with an arc discharge also arranged horizontally to the optical axis 12. The gas discharge lamp may be configured as a gas discharge lamp. The light source 2 has an optical axis 1 with respect to the reflector 1.
2 and also in a direction perpendicular to the optical axis 12.

第２図でフィラメント１３だけが示されている光源２は
、１３ａで示された、少なくともほぼ光軸１２上のリフ
レクタ１の焦点Ｆがある位置から、１３ｂで示されたリ
フレクタ１の頂点に向かってかつ光軸に対して垂直に上
部へずらされた位置へ運動することが可能である。The light source 2, of which only the filament 13 is shown in FIG. and to a position displaced upwards perpendicular to the optical axis.

１３ａ位置と１３ｂ位置間での光源の運動は直線に沿っ
て、あるいは任意の曲線に沿って行う　− ことができ、電気的、空気圧式、あるいは液圧式な調節
装置１４によってもたらすことができる。The movement of the light source between positions 13a and 13b can take place along a straight line or along an arbitrary curve and can be brought about by an electrical, pneumatic or hydraulic adjustment device 14.

光源２が１３ａの位置にある場合、前照灯によって、光
源から発せられた光のリフレクタ１での反射およびレン
ズ１５によって、車道１７上で第４図から明らかなよう
な細い光帯幅および最強高度Ｉｍａｘを有する光配分が
生ぜしめられる。この光配分は霧や降雪の際に好都合で
ある、それというのもこの場合には、車道前方はただ弱
く照明されるべきであって、できるだけ運転者の眩惑を
少なくするよう保つように、可能な限り鮮明な明暗境界
線１９が存在すべきであるからである。その明暗境界線
１９は実質的に、リフレクタ１より該リフレクタが２つ
の画部分４および５に分割されていることによって生じ
る。前面レンズ１５は水平に散乱する光学的機能を有し
、それによってリフレクタ１によって生じた光配分は、
扇状に広げられる。第５図は前照灯１６から散乱板なし
に測定スクリーン上に生じた光束２０を示し、該光束か
ら多くの等光度曲線２１が示されている。１３ｂのτ 位置に光源２がある場合、前照灯１６によつ、第６図に
示されているように、大きな光帯幅および低い最大光強
度１　ｍ　ａ　ｘを有する光配分が生ぜしめられる。こ
の光配分はスモッグや雨の際に好都合である、それとい
うのもこの場合には高い最大光強度は実質的に対向車の
眩惑を強化するだけで、運転者の視界距離の増大にはな
らない。明暗境界線１９の位置は第４図に比して変化し
ていない、それというのも光源２は垂直に上部へ、光軸
１２から離れているからである。この光源位置で前照灯
によって測定スクリーン上に生じた光束２３は第７図に
示され、この場合第５図と比較すると光束２０に比して
光束２３が垂直方向で大幅に拡張されていることにより
明らかに光帯幅は広げられる。When the light source 2 is in the position 13a, the headlights cause the light emitted from the light source to be reflected by the reflector 1 and the lens 15 to produce a narrow light band width and the strongest beam on the roadway 17 as is clear from FIG. A light distribution with an altitude Imax is produced. This light distribution is advantageous in fog or snowfall, since in this case the road ahead should only be weakly illuminated, keeping the driver's dazzle as low as possible. This is because there should be a bright and dark boundary line 19 as clear as possible. The light/dark boundary 19 results essentially from the fact that the reflector 1 is divided into two image parts 4 and 5. The front lens 15 has a horizontal scattering optical function, so that the light distribution produced by the reflector 1 is
Spread out in a fan shape. FIG. 5 shows the light beam 20 produced by the headlamp 16 without a scattering plate on the measuring screen, from which a number of isolight curves 21 are shown. With the light source 2 in position τ of 13b, the headlamp 16 results in a light distribution with a large light band width and a low maximum light intensity 1 m a x, as shown in FIG. It will be done. This light distribution is advantageous in cases of smog or rain, since in this case a high maximum light intensity only substantially increases the dazzling of oncoming vehicles and does not increase the driver's visibility distance. . The position of the bright/dark boundary line 19 has not changed compared to FIG. 4, since the light source 2 is moved vertically upwards and away from the optical axis 12. The luminous flux 23 produced by the headlamp on the measuring screen in this light source position is shown in FIG. 7; in this case, compared to FIG. 5, the luminous flux 23 is significantly expanded in the vertical direction compared to the luminous flux 20. This clearly widens the light band width.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は前照灯の正面図、第２図は前照灯の垂直中心断
面図、第３図は前照灯の水平中心断面図、第４図は光源
の第１に位置で前照灯によって生じた光配分を示す図、
第５図は光源の第１の位置で前照灯によって測定スクリ
ーン上に生じた等光度曲線を示す図、第６図は第２の位
置での光配分を示す図および第７図第２の位置での等光
度曲線を示す図である。 １・・・リフレクタ、２・・・光源、３・・・水平中心
平面、４・・・リフレクタの下方部分、５・・・上方部
分、７．９．１１、・・・放物線、８・・・垂直平面図
、１２・・・光軸、１３・・・フィラメント、１３ａ・
・・−方（第１）の光源位置、１３ｂ・・他方（第２）
の光源位置、Ｆ・・・焦点 ＝９Figure 1 is a front view of the headlamp, Figure 2 is a vertical sectional view of the headlamp, Figure 3 is a horizontal sectional view of the headlamp, and Figure 4 shows the headlight at the first position of the light source. Diagram showing the light distribution caused by the lamp,
5 shows the isolight curve produced by the headlamp on the measuring screen in the first position of the light source; FIG. 6 shows the light distribution in the second position; and FIG. It is a figure which shows the isophotonic curve at a position. DESCRIPTION OF SYMBOLS 1... Reflector, 2... Light source, 3... Horizontal center plane, 4... Lower part of reflector, 5... Upper part, 7.9.11,... Parabola, 8...・Vertical plan view, 12... Optical axis, 13... Filament, 13a.
... - side (first) light source position, 13b... other side (second)
Light source position, F...focal point = 9

Claims (1)

【特許請求の範囲】 １、リフレクタ（１）と、そのリフレクタにはめ込まれ
た光源（２）とを有し、その際、光源（２）とリフレク
タ（１）の間の相対的位置関係が、変更可能な自動車用
前照灯において、光源（２）とリフレクタ（１）の間の
位置関係が、一方の位置（１３ａ）では、光源（２）が
ほぼリフレクタ（１）の焦点（Ｆ）にあり、他方の位置
（１３ｂ）では、光軸（１２）に沿ってかつ又光軸に対
して垂直方向で焦点（Ｆ）から離れた位置にあるように
、変更可能であることを特徴とする自動車用前照灯。 ２、リフレクタ（１）が水平中心平面（３）で分割され
ており、その際、上方部分（５）は垂直な中心平面（８
）内で、下位部分（４）よりも短い焦点を有する、請求
項１記載の前照灯。 ３、両者のリフレクタ部分（４、５）一般放物線によっ
て形成されており、その際、水平中心平面（３）にある
両放物面の放物線が同一である、請求項２記載の前照灯
。 ４、上方リフレクタ部分（５）の垂直中心平面（８）に
ある放物線（９）が、水平中心平面（３）にある放物線
よりも短い焦点距離を、又下方リフレクタ部分（４）の
垂直平面にある放物線（１１）が、水平中心平面（３）
にある放物線（７）よりも長い焦点距離を有する、請求
項３記載の前照灯。 ５、光源（２）が光軸（１２）に対して、直角方向に水
平に配置されたフィラメント（１３）を有する白熱灯で
ある、請求項１から４までのいずれか１項記載の前照灯
。 ６、光源（２）が光軸（１２）に対して直角方向に水平
に配置されたアーク放電を有するガス圧放電灯である、
請求項１から４までのいずれか１項記載の前照灯。 ７、光源（２）がリフレクタ（１）に対して相対的に運
動可能である、請求項１から６までのいずれか１項記載
の前照灯。 ８、光源（２）が電気的、空気力式、又は液圧式調節装
置（１４）によつて運動可能である、請求項７記載の前
照灯。[Claims] 1. It has a reflector (1) and a light source (2) fitted into the reflector, where the relative positional relationship between the light source (2) and the reflector (1) is as follows: In a changeable automobile headlamp, the positional relationship between the light source (2) and the reflector (1) is such that in one position (13a), the light source (2) is almost at the focal point (F) of the reflector (1). and in the other position (13b), it is characterized in that it is changeable so that it is located along the optical axis (12) and also in a direction perpendicular to the optical axis and away from the focal point (F). Car headlights. 2. The reflector (1) is divided by a horizontal central plane (3), the upper part (5) being divided by a vertical central plane (8
2. The headlamp according to claim 1, wherein the headlamp has a shorter focus within the lower part (4). 3. Headlamp according to claim 2, characterized in that both reflector parts (4, 5) are formed by general parabolas, the parabolas of both parabolas in the horizontal central plane (3) being identical. 4. The parabola (9) in the vertical central plane (8) of the upper reflector part (5) has a shorter focal length than the parabola in the horizontal central plane (3) and in the vertical plane of the lower reflector part (4). A parabola (11) is in the horizontal central plane (3)
4. Headlamp according to claim 3, having a focal length longer than a parabola (7) located at . 5. Headlight according to any one of claims 1 to 4, wherein the light source (2) is an incandescent lamp with a filament (13) arranged horizontally at right angles to the optical axis (12). light. 6. The light source (2) is a gas pressure discharge lamp with an arc discharge arranged horizontally at right angles to the optical axis (12);
Headlamp according to any one of claims 1 to 4. 7. Headlamp according to claim 1, wherein the light source (2) is movable relative to the reflector (1). 8. Headlamp according to claim 7, wherein the light source (2) is movable by an electrical, pneumatic or hydraulic adjustment device (14).
JP2265290A 1989-10-07 1990-10-04 Head lamp for automobile Pending JPH03134903A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3933540A DE3933540C2 (en) 1989-10-07 1989-10-07 Headlights with a variable position of a light source arranged therein for motor vehicles
DE3933540.2 1989-10-07

Publications (1)

Publication Number Publication Date
JPH03134903A true JPH03134903A (en) 1991-06-07

Family

ID=6391027

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2265290A Pending JPH03134903A (en) 1989-10-07 1990-10-04 Head lamp for automobile

Country Status (4)

Country Link
US (1) US5047902A (en)
JP (1) JPH03134903A (en)
DE (1) DE3933540C2 (en)
FR (1) FR2652879A1 (en)

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DE19710632A1 (en) * 1997-03-14 1998-09-17 Bosch Gmbh Robert Vehicle headlamp for full beam and dipped beam
DE19716216A1 (en) * 1997-04-18 1998-10-22 Hella Kg Hueck & Co Headlights for vehicles
DE19805660A1 (en) * 1998-02-12 1999-08-19 Bosch Gmbh Robert Headlamps for low and high beam vehicles
DE19900605A1 (en) * 1999-01-11 2000-07-13 Bosch Gmbh Robert Vehicle headlamp for different light beams has source arranged in extra position(s) so beam from source is reflected with shorter range and lower maximum intensity than dipped beam
DE19941375A1 (en) * 1999-09-01 2001-03-08 Hella Kg Hueck & Co Headlights for vehicles
DE60128042T2 (en) * 2000-09-19 2007-08-16 Ichikoh Industries Ltd. Light source of vehicle lighting device
US6428187B1 (en) * 2001-03-03 2002-08-06 Jen Hsieh Shin Vehicle light beam adjusting device
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Also Published As

Publication number Publication date
DE3933540C2 (en) 1999-04-01
DE3933540A1 (en) 1991-04-11
FR2652879A1 (en) 1991-04-12
US5047902A (en) 1991-09-10
FR2652879B1 (en) 1994-04-22

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